Egyptians voted on Wednesday in a referendum on whether to introduce direct presidential elections with more than one candidate, but opposition groups called for a boycott saying the change did not go far enough. Egyptians trickled into polling stations adorned with posters of President Hosni Mubarak to say yes or no to a constitutional change replacing the old system of presidential referendums on a single candidate chosen by parliament. Police detained about 10 members of the Kefaya (Enough) protest movement in central Cairo when they tried to hold demonstrations opposing the referendum and the amendment. As before many recent Kefaya events, large numbers of Mubarak supporters turned up at the same venue to drown out the opposition with chants of "Not enough" and "Yes to Mubarak". Riot police surrounded the Kefaya group while allowing a much larger pro-Mubarak group to move freely. Opposition groups have long called for reform but say the conditions set in the amended Article 76 of the constitution will secure the post, held by Mubarak since 1981, for his ruling National Democratic Party (NDP). "Today is a day of mourning. Boycott the referendum on the disaster of 76" read the headline on the front page of the opposition Wafd Party newspaper. reuters